INTEREST-BEARING DEPOSITS AND SECURITIES (Held-to-maturity Securities) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	$ 88,626	$ 75,438
Gross Unrealized Gains	6,641	4,671
Gross Unrealized Losses	(91)	(2)
Fair Value	95,176	80,107
Percent of Total	100.00%	100.00%
Taxable municipal bonds [Member]
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	10,575	7,496
Gross Unrealized Gains	462	390
Gross Unrealized Losses	(91)	0
Fair Value	10,946	7,886
Percent of Total	11.50%	9.80%
Tax exempt municipal bonds [Member]
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	76,801	66,692
Gross Unrealized Gains	6,179	4,281
Gross Unrealized Losses	0	0
Fair Value	82,980	70,973
Percent of Total	87.20%	88.60%
Total municipal bonds [Member]
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	87,376	74,188
Gross Unrealized Gains	6,641	4,671
Gross Unrealized Losses	(91)	0
Fair Value	93,926	78,859
Percent of Total	98.70%	98.40%
Corporate bonds [Member]
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	1,250	1,250
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	(2)
Fair Value	$ 1,250	$ 1,248
Percent of Total	1.30%	1.60%